Which element has the greatest density at stp? calcium, chlorine, carbon or copper?

Answers

Answer 1

Answer: density = mass/volume

Since at STP, one mole of any gas occupies 22.4 liters, therefore, the volume is equal.
So, we will arrange based on mass.

From the periodic table:
mass of carbon = 12 grams
mass of calcium = 40 grams
mass of chlorine = 35.5 grams
mass of copper = 63.5 grams

Based on this:
copper has the highest density.

Answer 2

Answer:

The element that has maximum density at STP is copper.

Further explanation:

The property is a unique feature of the substance that differentiates it from the other substances. It is classified into two types:

1. Intensive properties:

These are the properties that depend on the nature of the substance. These don't depend on the size of the system. Their values remain unaltered even if the system is further divided into a number of subsystems. Temperature, refractive index, concentration, pressure, and density are some of the examples of intensive properties.

2. Extensive properties:

These are the properties that depend on the amount of the substance. These are additive in nature when a single system is divided into many subsystems. Mass, energy, size, weight, and length are some of the examples of extensive properties.

Density is a characteristic property of the substance. It is defined as the mass per unit volume. It is generally represented by $\rho$ .

The formula to calculate the density of the liquid is,

$\text{Density of liquid}(\rho)=\frac{\text{Mass of liquid(M)}}{\text{Volume of liquid (V)}}$

Standard Temperature and Pressure is denoted as STP and the volume of 1 mole of gas at STP is 22.4 litres.

The volume is constant and therefore density is directly related to mass.

Among the given elements copper has the highest molar mass and that is $63.5\;{\text{g/mol}}$ . Therefore the element that has maximum density at STP is copper.

Learn more:

1. Calculation of density: brainly.com/question/778841

2. Determine how many moles of water produce: brainly.com/question/1405182

Answer details:

Grade: Middle School

Subject: Chemistry

Chapter: Density

Keywords: density, mass, volume, STP, intensive, extensive, characteristic property, element, copper, chlorine, calcium, and carbon.

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Starch and cellulose are both produced by plants, yet one is easily digested by animals and the other is not. Discuss the differences in the structures of these two molecules and how this may impact whether they can be digested.

Answers

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952 grams of ammonium carbonate are dissolved to make 1750 mL of solution

Answers

(%m/v) =mass of solute (in g) / volume of solution (in mL) x 100

= 952 g (NH4)2CO3 / 1750 mL x 100

= 0.544 x 100

(%m/v) = 54.4 g /mL or 54.4% concentration of ammonium carbonate
solution

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Answers

Answer:

Multiuse nail forms.

Explanation:

Hello,

Nails extensions have been widely used to provide nails an extra length which is supposed to enhance the nails appearance. In such a way, different types of materials have been enforced in the light of the creation of those extensions which are known as multiuse nail forms which are pre-shaped plastic or aluminum enhancements used as a guide to extend nail enhancements beyond the fingertip for additional length. Materials such as cyanoacrylate (derived from acrylates) and aluminium turn out suitable for the manufacture of those multiuse nail forms as they provide stability during nail enhancement practices.

Best regards.

Gross Domestic Product includes consumption, net exports, _____, and _____. investments, government expenses intermediate goods, services last year's products, this year's products

Answers

Answer: The correct answer for the blank is-

Investments and government expenses.

Gross domestic product (GDP) is the total goods and services value, which is produced within the boundary of a country during a particular year.

GDP is measured by expenditure method, which includes investment, government expenditure, net exports (Exports-Imports), and consumption.

Thus, investments and government expenses is the right answer for the blanks.

Answer:

A) investments, government expenses

Explanation:

I got it right on Odyssey!

In an experiment, 12.0 dm3 of oxygen, measured under room conditions, is used to burn completely 0.10 mol of propan-1-ol. What is the final volume of gas, measured under room conditions? A 7.20 dm3 B 8.40 dm3 C 16.8 dm3 D 18.00 dm3

Answers

The chemical reaction is

C3H8O + (9/2) O2 = 3CO2 + 4H2O

Theoretical amount of oxygen needed = 0.1 mol of propanol ( 4.5 mol O2 / 1 mol propanol) = 0.45 mol

The amount of oxygen used in mol can be calculated using the ideal gas equation

PV = nRT

@room conditions

P = 1 atm

T = 25C ~ 298 K

R = 0.08205 mol – L/ atm – K

1 dm3 = 1 L

(1 atm) (12 L) = n (0.08205)*(298K)

n = 0.49 mol O2

Excess O2 = 0.49 – 0.45 = 0.04 mol O2

Amount of CO2 produced = 0.1 mol propanol (3 mol CO2/ 1 mol propanol) = 0.3 mol

Amount of H2) produced = 0.1 mol propanol (4 mol H2O/ 1 mol propanol) = 0.4 mol

TOTAL amount of gases = 0.04 + 0.3 + 0.4 = 0.74 mol

Therefore

V = (0.74*0.08205*298)/1

V = 18.0 dm3, the answer is letter D

Answer:The the correct answer is option (A).

Explanation:

$2C_3H_7OH+9O_2\rightarrow 6CO_2+8H_2O$

12 L of oxygen gas burns 0.10 mol of propanol.(1 L = 1 $dm^3$ )

According to reaction, 2 moles of propanol gives 6 moles of $CO_2$ then, 0.10 moles of propanol will give: $(6)/(2)* 0.10$ moles of $CO_2$ that is 0.30 mol.

$n_(CO_2)=0.30 mol$

The final volume of the gas evolved after the reaction can be determined by Ideal gas equation. Since, the reaction is taking place at room temperature the value of pressure and temperature will be:

At room temperature:

Pressure = 1 atm

Temperature , T= 293 K

$PV=nRT$

$PV=n_(CO_2)RT$

$V_(CO_2)=(0.30 mol * 0.0821 L atm/mol K* 298 K)/(1 atm)=7.33 L=7.33 dm^3$

The closest answer from the given options is option (A) that is 7.20 $dm^3$

The crystal lattice structure of ionic compounds is responsible for which set of characteristic properties?

Answers

Answer:

The characteristic properties are hard and brittle solids having high melting and boiling point

Explanation:

Ionic compounds are the type of chemical compounds that are formed by ionic bonding. An ionic compound is composed of two oppositely charged ions that are held together by electrostatic forces of attraction.

They are solids at room temperature and usually have a crystalline structure and have high melting and boiling point. Ionic compounds are hard but also brittle.

If your using Plato the answer is E.

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